Both of the tennis courts had _____ nets replaced.

Which pronoun agrees with the underlined indefinite pronoun?

ones

their

his

its

(CAN SOMEONE PLEASE HELP ME?)

"both" is plural, so ...

oobleck is right...another hint is 'tennis courts' which is as well as plural! If it's singular, it would be its (don't get this wrong!), his, hers, etc.